Abstract: An information providing system 1 according to an embodiment of the present invention includes an acoustic signal transmitter 10 for transmitting data in the form of sound waves, a portable telephone 20 serving as an acoustic signal receiver (terminal) for receiving the sound waves and reproducing the data, and a server 50 connected through the Internet 40 to the acoustic signal transmitter 10. The acoustic signal transmitter 10 may transmit the data as sound waves in one-way fashion at a timing determined by the acoustic signal transmitter 10 without reliance on transmission control signals or the like received from the acoustic signal receiver 20. The data which is transmitted as sound waves may employ data frame(s) which may contain information for error detection.

Abstract: An authentication system 1 that uses sound to transmit one-time password(s) may be equipped with portable terminal(s) 10, authentication terminal(s) 30, and authentication server(s) 50. Portable terminal 10 may be equipped with password generating unit(s) 21 which encrypt information including password generation user identifier(s) issued by authentication server(s) 50 and generate one-time password(s), encoding unit(s) 22 which encode one-time password(s) and generate baseband signal(s), carrier wave generating unit(s) 23 which generate carrier wave(s) in audible band(s), modulating unit(s) 25 which use baseband signal(s) to modulate carrier wave(s) and generate modulated signal(s), and speaker(s) 17 which transmit modulated signal(s) in the form of sound wave(s). One-time password(s) may be input as sound wave(s) from portable terminal(s) 10 to authentication terminal(s) 30.

Abstract: An authentication system 1 that uses sound to transmit one-time password(s) may be equipped with portable terminal(s) 10, authentication terminal(s) 30, and authentication server(s) 50. Portable terminal 10 may be equipped with password generating unit(s) 21 which encrypt information including password generation user identifier(s) issued by authentication server(s) 50 and generate one-time password(s), encoding unit(s) 22 which encode one-time password(s) and generate baseband signal(s), carrier wave generating unit(s) 23 which generate carrier wave(s) in audible band(s), modulating unit(s) 25 which use baseband signal(s) to modulate carrier wave(s) and generate modulated signal(s), and speaker(s) 17 which transmit modulated signal(s) in the form of sound wave(s). One-time password(s) may be input as sound wave(s) from portable terminal(s) 10 to authentication terminal(s) 30.

Abstract: Where information is to be conveyed as acoustic waves, embodiments of the present invention provide a transmitter capable of causing acoustic waves that convey information to be not easily perceived by the human ear. A transmitter, being an apparatus that converts various types of encoded information into acoustic wave(s) in the audible spectrum and carries out transmission thereof, comprises microphone(s) that cause ambient sound(s) from location(s) at which acoustic wave(s) is/are transmitted to be input as ambient sound signal(s); peak frequency detector(s) that detect, within ambient sound signal(s), peak frequency or frequencies of major constituent(s) of ambient sound(s); carrier wave generator(s) that generate carrier waves at a plurality of frequencies that are natural number multiples of peak frequency or frequencies and that can be used to mask ambient sound(s); and modulator(s) that modulate a plurality of carrier waves with baseband signal(s).

Abstract: An information providing system 1 according to an embodiment of the present invention includes an acoustic signal transmitter 10 for transmitting data in the form of sound waves, a portable telephone 20 serving as an acoustic signal receiver (terminal) for receiving the sound waves and reproducing the data, and a server 50 connected through the Internet 40 to the acoustic signal transmitter 10. The acoustic signal transmitter 10 may transmit the data as sound waves in one-way fashion at a timing determined by the acoustic signal transmitter 10 without reliance on transmission control signals or the like received from the acoustic signal receiver 20. The data which is transmitted as sound waves may employ data frame(s) which may contain information for error detection.

Abstract: A novel information providing system for providing various information to a terminal is proposed. The information providing system 1 according to an embodiment of the present invention includes a transmitter 10 for transmitting various information as information on sound pressure vibration, a portable telephone 20 serving as a terminal for receiving various information, and a server 50 connected through the Internet 40 to the transmitter 10. The configuration is characterized in that various information is transmitted as sound through the air serving as a medium from the transmitter 10 to the portable telephone 20.

Abstract: Where information is to be conveyed as acoustic waves, embodiments of the present invention provide a transmitter capable of causing acoustic waves that convey information to be not easily perceived by the human ear. A transmitter, being an apparatus that converts various types of encoded information into acoustic wave(s) in the audible spectrum and carries out transmission thereof, comprises microphone(s) that cause ambient sound(s) from location(s) at which acoustic wave(s) is/are transmitted to be input as ambient sound signal(s); peak frequency detector(s) that detect, within ambient sound signal(s), peak frequency or frequencies of major constituent(s) of ambient sound(s); carrier wave generator(s) that generate carrier waves at a plurality of frequencies that are natural number multiples of peak frequency or frequencies and that can be used to mask ambient sound(s); and modulator(s) that modulate a plurality of carrier waves with baseband signal(s).

Abstract: A novel information providing system for providing various information to a terminal is proposed. The information providing system 1 according to an embodiment of the present invention includes a transmitter 10 for transmitting various information as information on sound pressure vibration, a portable telephone 20 serving as a terminal for receiving various information, and a server 50 connected through the Internet 40 to the transmitter 10. The configuration is characterized in that various information is transmitted as sound through the air serving as a medium from the transmitter 10 to the portable telephone 20.